\documentclass[11pt]{article}
\usepackage{tikz}
\usepackage{pgffor}
\usetikzlibrary{shapes}
\usetikzlibrary{arrows}
\usetikzlibrary{trees}
\usetikzlibrary{patterns}

\begin{document}

\begin{figure}
\begin{center}

\begin{tikzpicture}[scale=0.75]			

\draw[very thin, color=gray, ->] (-0.15, 0) -- (13, 0);
\draw[very thin, color=gray, ->] (0, -0.15) -- (0, 10);

\draw (13.5, -0.4) node {{$\times 10^4$}};
\draw (6, -1.25) node {{Number of broken bonds}};
\draw[color=white] (-1.5, 4) -- +(90:1) node[midway,sloped,above, color=black]{{Number of CG iterations}};

\draw (3, 4.8) node {{Block-Jacobi}};

\draw (5.5, 0.75) node {{Multigrid}};
  
%Draw Row Ticks
\foreach \pos in {0, 2, ..., 12} {
\draw[very thin, color=gray] (\pos, -0.1) -- (\pos, 0.1);
\draw (\pos, -0.4) node {{\pos}};
}

%Draw Col Ticks
\foreach \pos/\val in {0/0, 1/20, 2/40, 3/60, 4/80, 5/100, 6/120, 7/140, 8/160, 9/180} {
\draw[very thin, color=gray] (-0.1, \pos) -- (0.1, \pos);
\draw (-0.75, \pos) node {{\val}};
}

\input{mgIters.tex}

\input{bjIters.tex}
	 		
\end{tikzpicture} 	

\end{center}
\end{figure}

\end{document}


			